import java.util.HashMap;
import java.util.Map;


public class Main {
	static void prepare(Integer x)
	{
	}
	
	public static void main(String args[])
	{
		HashMap<String, Integer> hash = new HashMap<String, Integer>();
		Integer x = 0;
		prepare(x);
		
		for (String key : hash.keySet())
			System.out.println(key + " = " + hash.get(key));
		System.out.println("hello world");
	}
}
